Assig-nob of one-fourth to frank h



L. W. DOREN.

. FIREPROUF DOOR.

Arrucmon msu un z. 19:5.

1,152,011. Patented Aug. 31,1915.

2 SHEETS-SHEET l.

IIYEITDR LWBoren HEY MYEHTOR L. W. DOREN.

FIREPROOF DOOR.

Armenian man In I. 191s.

Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

UMTED STATES PATENT OFFICE.

LEWIS W. DOBEN, F DALLAS, TEXAS, ASSIGNOB OF ONE-FOURTH T0 FRANK I. ITACEON, ONE-FOURTH T0 GEBEBT DURAND, AND ONE-FOURTH T0 LOUIS P.

DURAND.

FIBEPROOF DOOR,

Specification of Letters Patent.

Application led Kay 7, 1915. Serial 1\ o. 28,509.

To all 11:11amA -zmay concern Be it lmown that I. Lewis W. Donna', a citizen of the United States, residing at Dal las, in the county of Dallas and State of 5 Texas have invented certain new and useful Improvements in Fireproof Doors, of

which the following is a specii'ication.

My invention has relation to an improve ment in the construction of fire doors and in 1g such connection it relates more particularly to the arrangement and construction of the parts of such a door.

Heretofore in the construction of lire doors some attempts have been made to secure a substantially all metal door, but so far as I :unaware all these prior structures were defectlve m one or more partlculars.

Thus in the earlier doors. the structure was a arly formed wooden door, wholly in. in sheet iron or block tin plate. Such a construction is bulky, heavy and not easily.Y moved on hangers and in case of fire the intez-nal wooden core was destroyed with the creation of internal gases which disrupted ,35 and distorted the exterior metal casing.

Again attempts have been made to form the door of corrugated iron or similar sheet metal either without an internal core or 1 with an internal laver or sheet of asbestos 'n or similar lire proo material. In doors iof this construction y e corrugated lates were firmly held in a rigid metallic game and while the extreme edges of the door f triviere firmly held posiitoih oni the framef, l5 eremammgportlons, `e oorw'aso relatively large size, crinkled or buckled in ordinary use the buckling or warping being due to the relative thinne of the metalg lic sheets and their relative large size and p heavy weight. In such corrugated metal if doors, the sheets being rmly and rigidly securedtotheframeandtoeach other, the

tendency of the sheets to expand and contract under variations in temperature ca [i the doors to warp from their required level f orplaneandincaseofexcessheatthis warp' was' so great as to render the doors 2. incapaheoffutureuseaswellaspreventng the opening orclosing of the doors while [l the were subjected to such excessive heat. y my present invention there is provided a lire door of simpl;1 gxiistrulflzltoul the ar- @A t su tw'e eparts of the'doorlrlrmly tied transversely and the faeings furthe door are firmly supported within a rigid frame, the fastenings and supports are such as to permit of expansion and contraction of the plates or facings for the door under ordinary variations in temp erature and to permit of uniform expansion of the door faces even under exce heat 1n which instance the fastenngs and supports automatically permit movement of the plates t In carrying out my invention there are provided side and end metallic piec of tubular construction, joined at the corners m a frame or frame work, and. these tubular pieces constitute sup orts for webbed plates shding in or on e tubular frame pleces. 'Ihe corners of the tubular frame work are Joined by angular brackets whereon the tubular pleces may slide, and the co o'ated sheet metal faces of the door are umte attheir edges to the brackets and webbed plates by, preferably, bolts or rivets passing thro bot-h of the corru ted faces ofthe dooran slotsformedinthe yofthe brackets and webs of the plates. If dired the metallic faces of the door may inclose a sheet of asbestos or other re proof packmg and, m case the doors are of relatively large area, may be provided transverse, at, remforcmg strips or bars between the faces of the door, said stri s orbars bea5 lng secured to the faces by a 1t and slot connection and said strips having a sliding connection at their ends with the sides of the tubular frame work.

The nature and scope of my invention 9o -will be more fully understood from the fo1- lowing description taken in connection with the accompanying drawings forming part heleof, 1n wln fr el igure 1,'is a ontevational view rtly 95 broken away of a ire door the main features of my invention. F' :2, is

an enlfaged cross-Bg sectional gagged line a,a,o ig.1. .3,isan lo t-udinal sectional view taken on line glb 10o of Fig. 1. Fig. 4;, is a perspective view of one of the corner brackes. Figs. land 6 are perspective views o respective v the side and end webbed plates. Fig. 7, is a front view of a portion of a door embodya modified form of my invention 8, 1s a longitudinal sectional view taken on line c, c of Fig. 7. Fig. 9, is a cross-sectional view taken on line d, d of Fig. 7. 10,

is a view corresponding to Fig. 7, but illus- 11u trating a still :further modified form of the invention. Fig. 11, is a longitudinal sectional view taken on line e, e of Fig. 10, and

Fig. 12, is a cross-sectional view taken on line f. f of Fig. 10.

Referring to the drawings, 1, 1 represent the front and rear faces of the door formed pre erably of corrugated sheet metal. While each a is shown in the drawings to be in one piece it is manifest that the faces may be made u p of a plurality of panels or sections if desired. 'h'ere doors of relatively large area are employed, suitable transverse stiiening strips or bars are interposed between the faces 1, 1 and united thereto by bolts or rivets 3 passing thro Uh both faces 1 1 and through longitudinully disposed slots 4 in strips 2. If

desired a layer 5 of asbestos or other heat insulation material may also be inte sed between the faces 1, 1 of the doorriing held to position therein by said faces when the faces 1, 1 are clam d, bolted or riveted to the strips 2. In osing the edges of the two faces of the door is a frame work which, with the auxiliary parts as shown in Figs. 1 to 6 inclusive, consists of the following preferred construction and arrangement of parts. The frame work consists of the top and bottom end tubular rods 6, 6 of any form or shape in cross-section both longi tudinally slitted or slotted, with the respective slots facing toward each other and to ward an adjacent top or bottom edge of the g5 door faces 1, 1. The frame work further consists of the side rllllt ods 7, 7 corresponding @to tubes e our rods 6, 6, 7, 7, are united into a frame by the corner brackets 8. These brackets 8, made 4. preferably of cast metal are substantially r ;r in outline, and, asillustrated in d in Fig. 4, have an hypotenuse proed gvith 'the semicrcular or corrugated des ittmg' into correspondmg` corruga- 45 tions measured diagonally acro the inner side of each face 1, 1, of the door. A web lconnectsthecorru tedh use9 11 ped with the vertical and orizo each of which is substantially star uincrosssection. Theedgesllmeetina cubical corner piece 12 forming a corner for the door. The web 10 of the bracket ad.- jacenttoeachedgellisofawidthsmall enough to slide in the slot of an adjacent il mveloping tube 6 or 7 and the star shaped edg 11 ar'eof a diametersmall enough to fit snugly inthe interior of a tube 6 or 7 and to slide with relative ease therein. The portion of web 10 adjacent to each edge is 'u provided one or more elongated open- 1ngsorslots13,so`asto 'tabolt,or rivet 14 to passthrough faces 1 and the bracket 8 toclamp the faces to each othetand to the-;bracket. To further stiEen "ai the connection between tubes 6, 7, bracket 8,

and faces 1 at the corners and thus to prevent buckling under torsional strain at the corners of the door, each bracket has along its vertical edge 11 an angular or rounded or semi-cylindrical lug 15 fitting longitu- 7c dinally into a corrugation of each face 1 and along its horizontal edge, one or more semi-circular projections or lugs 16 fitting transversely into one or more corrugations of faces 1. 75

In each vertical side tube 7 is arranged to slide a series of webbed plates 17 (see Fig. 5) constituting with the brackets S a means for securing the vertical edges of faces 1 to the tubes 7. Each webbed plate 17 has a so head 18 of a shape referably corresponding in outline and 1n y with a vertical or horizontal edge 11 of the brackets and this head 17 fits snugly and slides with relative ease in tube 7 with the flat web or body of 35 the plate 17 projecting through the slot of vsaid tube. The inner edge o f plate 17 has on either face one or more semicircular lugs 19 fitting longitudinally a corrugation of faces 1-1. The body of plate 17 is provided with 90 an elongated slotor opening :20. The edges of the faces 1 of the door are united to the plates 17 by bolts or rivets 21 pa through both faces and through slots 20 o plates 17. In horizontal rods or tubes 6, are '95 arranged to slide webbed plates ..92 (see Fig. 6) which co nd in shape and 1n function with the p tes 17 with the single exception that although the bodv of the plate is slotted as at 23 its edge preferably has no projection or lug to interlock transversely with a corrugation or corrugations in faces 1. The width of plates 22 is preferably sufcient to cover two or more complete oorrugations of faces 1. A bolt or rivet 24 pas mg through both faces 1 and the slot 23 of .eachplate22servestofastenthefaces1 to er andtothe plates22.

Fig. 1 the door is shown as of rectan 211' ofutlmtl'1 edbut it isbemamf' that at1l11e o e oor may van especx y at uppermost edge. .In Fig. 1 the door isillustratedassuspendedfromarail25by means of h 26 of well known con struction. The rivets or bolts 27 uniting the door faces to the hanger lates 26 also traverse by preference a enng brace plate 28m betweenthetwofaceslasindicated m Fig. 3.

InF 7to9amodiiiedformoftheinvention 1s wherein the plates 17 ofFigs.1to6arereplacedbyasingle webbed rail or plate 29 of substantially T shlpl The head 30 of this plate ts snugly wi thetubes or'l and ltsflatweb pro jects through a slot of a tube 6 or 7.

InFigs. 10to12astillfurthermodiiied form of the invention is shown in which the plates 17 or plate 29 are replaced by a split sleeve 31 littmg to slide on the exterior of 13o tubes 6* and '4" which in this instance are unslotted. The sleeves 31 have meeting flanged ends 32 extendingnto the space between faces l of the door and having elongated slots through which pass the bolts or rivets 33 which also traverse the faces 1 of the door as clearly shown in Fig. 11.

In all forms of the door there is a sliding connection between the two faces, brackets and plates and the tubes supporting the sam'e and wherever the faces are umted together, or to the supporting plates, the connection is such as to permit of some expansion or con traction o the faces without disrupting their union with the supporting plates and frames.

Having thus described the nature and objects of my invention, what I claim as new and desire to secure by Letters Patent, is,-

1. A frame for a fire door comprising side and end tubes each longitudinally slotted and brackets each having a. vertical a horizontal edge in sliding en en t with said tubes, and a body portion projec r thro the slots of said tubes, combin with eet metal faces for the door, a means in sliding engagement with said tubes and secured to said metal faces to constitute a fastening for the edges of said faces to the tubes, and means for securing the fac adjustably to the body portions of said brackets.

2. In a device of the character described, a frame work comprising slotted tubes and corner brackets connecting the same, webbed plates having a range of movement wi the tubes, the web of the plates trav the slotted portions of the tube, combin E tamfacsrdmf mm om etues,te osai aces united to the webs of the plates.

3. In a device of the character described, a frame work comprising slotted tubes and corner brackets connec the same, webbed plates each having a hea sliding in a tube and a body portion traversing the slot of the tube, said body provided wlth elongated openings, combined with metallic faces for the door disconnected from the tubes, the

edges of said faces engaging the body portions of the plates, and means traversing.

said faces and the elongated openings in the plates and arranged to clamp the faces tev said lllates.

4. a. fire door, a frame work comprising tubes, and corner brackets, combined with two corrugated metallic plates constitutng the faces of the door, webbed plat longitudinally adjustable with to the tubes, said plates provided with a slotted body rtion interlocking with the corrugated aces of the door and fastening means traversing said faces and the slotted body portion of the plates to thereby unite the aces to. said plates.

In testimony whereof I have signed my name to this specification.

LEWIS W. DOREN.

Copictthispatentnxybeobtainedtortveeeataeachhyadresslngthe Commissioner othtexts, Washingtoinn.' 

